点击次数：

所属单位：能源与动力学院

发表刊物：PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING

关键字：Small crack crack growth fatigue lifetimes stress level titanium alloy

摘要：In this paper, the small fatigue crack behavior in titanium alloy TC4 under different stress levels was investigated. Single-edge-notch tension specimens were axially fatigued with stress ratio of 0.1 at room temperature. Results show that the naturally initiated cracks nucleate from the alpha/beta interfaces. When the crack is below a critical length of similar to 200 mu m, crack growth rates exhibit large fluctuations and temporary retardations due to microstructure effects. But once the crack length exceeds similar to 200 mu m, the fluctuations in crack growth rates die down and the crack grows more rapidly. There is no distinct effect of stress level on small crack growth rate. A linear relationship exists between the total fatigue life and crack initiation life.

ISSN号：0954-4100

是否译文：否

发表时间：2019-12-01

合写作者：Zhu, Lei,江荣,宋迎东,Qu, Shoudao

通讯作者：胡绪腾